The problem with in-person signatures is the amount in which they vary and are very often atypical. I was looking at his Jeff Bridges and I don’t like the True Grit ones although the one with Jeff and Matt Damon is not too bad. The TRON signature is much more typical of Jeff’s signature. I also took a look at his Sammy Hagar and it seems okay only rushed. I am not an expert however. He says that he guarantees that it will pass a third party authenticator so I would contact him and tell him exactly what you are interested in. I would also send it off to a reputable third party authenticator and return it if it does not pass but you need to get details from the seller about how to go about doing that. If you have any doubts whatsoever don’t bother purchasing anything.